Preparation method of novel magnetic arsenic removal solid chelating agent

A chelating agent and magnetic technology, applied in the field of environmental chemistry, can solve the problems of low adsorption capacity and small number of zirconium phosphonate functional groups, etc., and achieve the effect of large adsorption capacity, strong selectivity and stable structure

Inactive Publication Date: 2018-09-25
CUG WUHAN GOLDEN SHIELD ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Wei Junying published the paper "Highly efficient enrichment of phosphopeptides by magnetic nanoparticles coated with zirconium phosphonate for phosphoproteomeanalysis" in Rapi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) 4g of magnetic NiFe with a particle size of 200nm 2 o 4 Add the nanoparticles into 50mL of absolute ethanol, stir and disperse evenly, add 5g of tetraethyl orthosilicate and 6mL of ammonia water, continue to stir and react at 40°C for 3h, and separate the solid particles with a magnetic field. The magnetic particles were washed with deionized water and absolute ethanol several times, and dried to obtain magnetic NiFe 2 o 4 @SiO 2 Microsphere matrix;

[0031] 2) Add 5g of magnetic NiFe 2 o 4 @SiO 2 Add the microsphere matrix into 60mL of absolute ethanol, stir and disperse evenly, then add 1g of 3-chloropropyltriethoxysilane, continue to stir and react at 50°C for 6h, and separate the solid particles with a magnetic field. Wash the magnetic particles with deionized water and absolute ethanol several times, and dry to obtain chlorinated functionalized magnetic particles;

[0032] 3) Add 6g of chlorinated functionalized magnetic particles to 70mL of absolute eth...

Embodiment 2

[0038] 1) 3g of magnetic NiFe with a particle size of 300nm 2 o 4 Add the nanoparticles into 50mL of absolute ethanol, stir and disperse evenly, add 6g of tetraethyl orthosilicate and 7mL of ammonia water, continue to stir and react at 20°C for 6h, and separate the solid particles with a magnetic field. The magnetic particles were washed with deionized water and absolute ethanol several times, and dried to obtain magnetic NiFe 2 o 4 @SiO 2 microsphere matrix;

[0039] 2) 4g magnetic NiFe 2 o 4 @SiO 2 Add the microsphere matrix into 60mL of absolute ethanol, stir and disperse evenly, then add 1g of 3-chloropropyltriethoxysilane, continue to stir and react at 20°C for 12h, and separate the solid particles with a magnetic field. Wash the magnetic particles with deionized water and absolute ethanol several times, and dry to obtain chlorinated functionalized magnetic particles;

[0040] 3) Add 5g of chlorinated functionalized magnetic particles to 70mL of absolute ethanol, ...

Embodiment 3

[0045] 1) 4g of magnetic NiFe with a particle size of 500nm 2 o 4 Add the nanoparticles into 50mL of absolute ethanol, stir and disperse evenly, add 6g of tetraethyl orthosilicate and 7mL of ammonia water, continue to stir and react at 30°C for 4h, and separate the solid particles with a magnetic field. The magnetic particles were washed with deionized water and absolute ethanol several times, and dried to obtain magnetic NiFe 2 o 4 @SiO 2 microsphere matrix;

[0046] 2) Add 5g of magnetic NiFe 2 o 4 @SiO 2 Add the microsphere matrix into 60mL of absolute ethanol, stir and disperse evenly, then add 1.5g of 3-chloropropyltriethoxysilane, continue to stir and react at 50°C for 8h, and separate the solid particles with a magnetic field. Wash the magnetic particles with deionized water and absolute ethanol several times, and dry to obtain chlorinated functionalized magnetic particles;

[0047] 3) Add 6g of chlorinated functionalized magnetic particles into 70mL of absolute...

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Abstract

The invention relates to a magnetic arsenic removal solid chelating agent powder material and a preparation method thereof, wherein the particle size is 0.5-500.0 [mu]m. According to the method, SiO2particles coated with a magnetic material inside are selected as a core shell material matrix, a phosphonic acid functional group is introduced on the shell layer through surface modification, and metal ions having affinity for arsenic are complexed to prepare the novel magnetic arsenic removal solid chelating agent powder material. According to the present invention, the chelating agent has characteristics of stable structure, wide application range, strong chelation and trapping ability, can perform selective adsorbption separation and enrichment on arsenic oxide ions in water soil, soil orsolid-liquid suspension (mixing) systems, can be rapidly separated from water, soil and solid-liquid suspension systems by magnets or magnetic separation devices so as to be conveniently regenerated and recycled, has low cost, can be widely used for the large-scale automated metal ion separation in soil and other complex systems or mineral separation equipment, and can be used in the fields of environmental protection, pollution control, biological separation, mining and other industries.

Description

technical field [0001] The invention relates to a preparation method of a novel magnetic arsenic-removing solid chelating agent. The chelating agent can selectively adsorb, separate and enrich arsenic oxide ions in water and soil, in soil or in a solid-liquid floating (mixed) system. The method belongs to the field of environmental chemistry. Background technique [0002] As is a highly toxic and carcinogenic element. The development and smelting of minerals, the use of As-containing pesticides and fertilizers, etc., allow arsenic to enter the environment and gradually accumulate in the soil. Since arsenic, like heavy metals, is non-degradable and relatively stable in the environment, it is difficult to eliminate it after entering the soil. Since As mainly exists in the form of anions in soil, it is more difficult to remediate soil contaminated by other heavy metals. In soil, As(Ⅲ) is more toxic to crops than inorganic As(Ⅴ). As has a high affinity with sulfhydryl groups...

Claims

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Application Information

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IPC IPC(8): B01J20/22C02F1/28B01J20/30B01J20/28
CPCB01J20/06B01J20/103B01J20/223B01J20/28009C02F1/288
Inventor 范力仁赵攻城刘骏龙欧阳光明
Owner CUG WUHAN GOLDEN SHIELD ENVIRONMENTAL TECH CO LTD
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